Street-lighting equipment



April 12, 1927. 1,624,237

D. B. HANNA STREET LIGHTING EQUIPMENT Filed June 10. 1925 I J/wenZOr.Dazrici ,B amuL Patented Apr. 12, 1927.

DAVID '13. HANNA, or PARK RIDGE, ILLINOIS.

STREET-LIGHTING EQUIPMENT.

Application filed June 10, 1925. Serial No. 36,176.

My invention relates to outdoor illumination, and more specifically tothe illumination of streets and roadways.

In the concrete installations of the prior art, a lamp post or the likeis installed at a given point and nearby it is positioned a box orcontainer, usually of metal, to which the main power leads are extended,and from which individual conductors for supplying current to the lampextend. This box frequently contains an electrical transformer ortransmitter, although in. certain systems it is a mere connection box.The use of such a box necessitates two installations; and a box adequateto protect its contents from the weather and from such pedestrian andother trafiic as it may be exposed to. is an expensive item. The wiresfrom the box to the lamp itself must be protected and have suitablefittings both where they leave the box and where they enter the post.

In installations employing metal posts a small door is provided in thebottom of the post and the transmitter simply sets inside. In such aninstallation, when a vehicle accidentally smashes the post, thetransmitter is likely to be wrecked also.

Among the objects and advantages of the present invention may beenumerated:

First, to protect the transmitter more elfectively than in either of theprior artinstallations.

Second, to provide a practical construction materially cheaper tomanufacture and in stall than either of those at present in use.

Third,- to provide such a construction that will be more satisfactory inservice.

Fourth, to provide such a construction that will be more convenient forrepair purposes.

Further objects and advantages of my invention will become apparent asthe description proceeds.

In the accompanying drawings:

Figure l is aside elevation of astreet lami) according to the invention.

Figure 2- is a central vertical section through the lower portion of thelam post and its foundation.

Figure 5 is a bottom view of the post, looking from line of Figure 2 inthe direction of the arrows.

In the embodiment of the invention selected for illustration, I haveillustrated a concrete post comprising a. shaft surmounted by a capital12 supporting the lighting unit 14, and a pedestal 16' mounted on thebase 18. i

A central tube 20 provides an axial bore up the post from the dome 22 ofthe spider 24:. through which comluctors 26 carry current to thelighting unit. The concrete 28 may be reinforced by a series of rods 30in addition to the central tube 20, if so desired.

The foundatimi 32 has been illustrated as a concrete block with itssurface at 34 substantially flush with the adjacent terrain 36. A recess38 is formed in the upper surface of block 32 registering with the dome22 of the spider. One or more passage-ways 40 lead from the bottom ofthe recess 33 diagonally downward and outward, preferably terminating atsuch a level that the conduit 42 through which the power mains arecarried from one post to the next, may open directly into thepassageovzrvs without change of level.

lVithin the recess 38, suitable transmitting means 4% is positioned.This transmitting means may or may not comprise an electrical unitcapable of changing the voltage or ampeiage, or both, of the current inthe power mains 4-6. In some instances it will be a mere electri *alconnection. It is preferably set on small pedestals 4S space-d slightlyfrom the bottom of the recess. This arrangement, combined with thedownward slant of the passage-ways 40 is of material advantage in casemoisture should reach the recess.

The spider 24 is provided with a plurality of lugs 50, in this instancethree, extending beyond the contour of the base 18 and having slottedholes 52 to receive suitable hold-down means 54 illustrated as boltsembedded in the concrete of the foundation. The bolts preferably havedetachable nuts 56 at their upper ends, and the whole assembly duringordinary service periods is preferably capped over with grouting at 58,which also seals the joint between the post and its support.

lVhere an iron post is employed the recess materially protects thetransmitter, and the door may be omitted, if desired, thus savingexpense and securing a stronger post.

As compared with previous concrete installations, the extra box iscompletely eliminated but the t-ransn'iitter is better protected thanbefore. To get access to con ductors 2G and L6 and the transmitter, thegrouting can be easily knocked away, two

of the hold-dmvns disconnected, and the post tipped'a little and swungaround the remaining hold-down as a vertical pivot to uncover therecess. Suitable coils in the conductors 26 will readily permit suchmovement.

\Vithout further elaboration, the foregoing will so fully explain thegist of my invention, that others may, by applying current knowledgereadily adapt the same for use under various conditions of service,without eliminating certain features which may properly be said toconstitute the essential items of novelty involved, which items areintended to be defined and secured to me by the following claims:

I claim:

1. A street lamp comprising a foundation and a post mounted thereon,said post comprising a base and a superstructure, said base having aspider with a central dome, said post having a bore extending up :tromthe top of said dome, said foundation having a recess under said domeand passageways extending from said recess outward and downward to drainsaid recess, an underground conduit level withthe ends of said passagesand communicating with them, electrical conductors in. the bore of saidpost, transmitting means in said recess establishingoperative electricalconnection between said conduit and post conductors, said spider beingof metal. and having a plurality of peripherally-spaced lugs extendingout beyond said base, hold-down means fastening said lugs to saidfoundation, and grouting covering said lugs and holdwlown means, saidhold-down means being detachably connected with said lugs, and said postconductors having coiled extensible portions in said dome.

2. A street lamp comprising a foundation and a post mounted thereon,said post comprising a base and a superstructure, said base having aspider with a central dome, said post having a bore extending up fromthe top of said dome, said foundation having a. recess under said dome,electrical conductors leading into said recess, electrical. conductorsin the bore of said post,

transmitting means in said recess establishing operative electricalconnection between said recess conductors and post conductors, saidspider having a plurality of peripherally spaced lugs extending outbeyond said base, and hold-down means fastening said lugs to saidfoundation, said hold-down means being detachably connected with saidlugs.

3. A street lamp co ,iprising a founda tion and a concrete post mountedthereon, said post comprising a base and a supen structure, said basehaving a spider, said base and foundation defining an enclosed chamber,said post having a bore extending up from said chamber, electricalconductors leadings into said chamber, electrical conductors in the boreof said post, and transmitting means in said chamber establishingoperative electrical connection between said chamber conductors and postconductors, said spider having a plurality of peripherally spaced lugsextending out beyond said base, and hold-down means detachably fasteningsaid lugs to said foundation, said. base and foundation abutting on aplane flush with the sm'rounding terrain.

4t. A street lamp comprising a toundation and a concrete post mountedthereon, said post comprising a base and a superstructure, said basehaving a spider, said base and foundation defining an enclosed chamber,said post having a bore extending up from said chamber, electricalconductors leading into said chamber, electrical conductors in the boreof said post, transmitting means in said chamber establishing operativeelectrical connection between said chamber conductors and postconductors, said spider having a plurality of peripherally spaced lugsextending out beyond said base, and holddown means detachably fasteningsaid lugs to said foundation, said base and foundation abutting on aplane flush with the surrounding terrain, the conductors extending pastthe plane of said spider having coiled. extensible port-ions in saidchamber.

In witness whereof, I hereunto subscribe my name this lth day of June,1925.

D AVID B. HANNA.

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